package com.example.demo.common.com.example.demo;

import com.amazonaws.services.dynamodbv2.xspec.S;

import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.WeakHashMap;

public class Demo07 {


    public static void main(String[] args) throws InterruptedException {


        /*List<Integer> list = Collections.singletonList(-1);
        System.out.println(list);


        ThreadLocal<Integer> tli = new ThreadLocal<>();

        tli.set(666);

        tli = null;

        System.gc();
        Thread.sleep(1000);

        System.out.println(tli);*/


    }


}
